fix: fixes first few lines not showing up. fixes #3139 (#3142)

Author: amir20

internal/docker/client.go

@@ -323,7 +323,7 @@ func (d *httpClient) ContainerStats(ctx context.Context, id string, stats chan<-
 func (d *httpClient) ContainerLogs(ctx context.Context, id string, since time.Time, stdType StdType) (io.ReadCloser, error) {
 	log.WithField("id", id).WithField("since", since).WithField("stdType", stdType).Debug("streaming logs for container")
 
-	sinceQuery := since.Add(time.Millisecond).Format(time.RFC3339Nano)
+	sinceQuery := since.Add(-50 * time.Millisecond).Format(time.RFC3339Nano)
 	options := container.LogsOptions{
 		ShowStdout: stdType&STDOUT != 0,
 		ShowStderr: stdType&STDERR != 0,

internal/docker/client_test.go

@@ -156,7 +156,7 @@ func Test_dockerClient_ContainerLogs_happy(t *testing.T) {
 		Follow:     true,
 		Tail:       "100",
 		Timestamps: true,
-		Since:      "2021-01-01T00:00:00.001Z"}
+		Since:      "2020-12-31T23:59:59.95Z"}
 	proxy.On("ContainerLogs", mock.Anything, id, options).Return(reader, nil)
 
 	client := &httpClient{proxy, filters.NewArgs(), Host{ID: "localhost"}, system.Info{}}